Gemstone setting



FIG. 1 is a top perspective view of a gemstone setting showing my new design;

FIG. 2 is a top and side perspective view thereof;

FIG. 3 is a side perspective view thereof;

FIG. 4 is a side elevational view thereof; and,

FIG. 5 is a top plan view thereof.

The broken lines shown in the drawings represent portions of the gemstone setting which form no part of the claimed design. 

CLAIM The ornamental design for a gemstone setting, as shown and described. 